Please Help! clutch problem

[Desperate owner]

I am new to threading and to the Honda Passport! We got it really cheap with some transmission problems. All the gears inside were stripped and the clutch was bad. Picked up a used Isuzu Rodeo transmission and a new clutch set. We have been through 3 clutch sets because the retainer ring will not stay with the pressure plate. Now we cant get the bearing to lock into the pressure plate. Any ideas?? or anyone have the same problems in the past? Thanks!